CN110833763B - Production process and equipment for organic flue gas incineration, desulfurization, dust removal and denitrification - Google Patents

Abstract

The invention discloses a production process and equipment for organic fume incineration, desulfurization, dust removal and denitration, which solve the problems of incomplete environmental pollution caused by organic fume purification in the prior art and are characterized in that: the organic matters in the flue gas are combusted through the incinerator, waste heat utilization is carried out on the combusted high-temperature flue gas, and the incinerated flue gas is treated through the processes of desulfurization, dust removal, denitration and the like, so that the flue gas reaches the standard and is emptied. Namely, an incinerator (2) is additionally arranged above the kiln (1), a smoke exhaust pipe (26) of the incinerator (2) is connected with a waste heat recycling device, a desulfurizing device (9), a dust removing device (10) and a denitration device through an air heat exchanger (3), and purified and standard smoke is sent into a smoke exhaust pipeline (12) through a smoke exhaust induced draft fan (13) and then is discharged into the air from a chimney (14). Has the advantages of reasonable structure, safe operation, comprehensive utilization, integrated purification, energy conservation, environmental protection and the like, and can be widely applied to the purification treatment of organic flue gas of various kilns.

Description

Production process and equipment for organic flue gas incineration, desulfurization, dust removal and denitrification

Technical Field

The invention belongs to the field of industrial thermal equipment, and in particular relates to a production process and equipment for incineration, desulfurization, dust removal and denitrification of organic smoke from industrial kilns.

Background technique

In recent years, the number and scale of industrial kilns have continued to expand. Existing industrial kilns directly discharge flue gas or discharge it after simple treatment. Some of the flue gas still contains organic matter, some of the flue gas contains excessive sulfur, some of the flue gas contains excessive dust particles, and some of the flue gas contains excessive nitrogen oxides. The pungent smell of organic flue gas affects the normal life of residents, a large amount of heat in the flue gas is wasted, the emission of sulfur elements in the flue gas will form acid rain, and the emission of particulate dust in the flue gas will cause haze; high concentrations of nitrogen oxides in the flue gas will cause problems such as imbalance in the earth's ecosystem. In short, flue gas emissions will cause a series of problems such as haze in the north in winter and abnormal climate in the south, which seriously affect the living environment of human beings. Therefore, the country is also paying more and more attention to the management of emissions and environmental protection, so the integrated flue gas treatment process and equipment of industrial kilns are imminent.

Summary of the invention

The purpose of the present invention is to provide the market with a production process and equipment for organic flue gas incineration, desulfurization, dust removal and denitrification with reasonable structure, safe operation, comprehensive utilization, integrated purification, energy saving and environmental protection.

The technical solution of the present invention is: it uses an incinerator to perform secondary combustion on organic matter in the flue gas, and utilizes the waste heat of the high-temperature flue gas after combustion, and then further treats the flue gas after combustion through processes such as desulfurization, dust removal, and denitrification, so that it meets the emission standards and is discharged into the air. The specific steps are as follows:

(1) Use an incinerator to perform secondary incineration on the organic matter in the flue gas so that the organic matter in the flue gas is completely burned;

(2) Preheat the combustion air of the incinerator by passing the high-temperature flue gas through an air heat exchanger, preheat the normal-temperature combustion air to 450°C, and send the high-temperature air to the incinerator for combustion (theoretical and practical results show that for every 100°C increase in the combustion air temperature, 5% of fuel can be saved);

(3) Use the heat transfer oil heat exchanger to preheat the heat transfer oil with the heat carried by the high-temperature flue gas, preheat the normal temperature heat transfer oil to 180°C, and then transport it to the industry, energy, chemical industry and other industries for use;

(4) Use air-to-air heat exchangers to preheat the high-temperature flue gas to 450°C. The hot air can be used for workshop heating, product drying, etc.

(5) Sulfur and sulfur compounds in flue gas are removed by chemical adsorption using a desulfurization device and a baking soda dry desulfurization process;

(6) Use flue gas dust removal equipment to remove dust from the flue gas after desulfurization. When the dust-laden gas enters the membrane bag filter, due to the effect of gravity, the dust that is larger and heavier than the membrane bag filter settles and falls into the ash hopper. The fine dust-rich gas passes through the filter material, and the dust is blocked, so that the purified gas enters the subsequent process of desulfurization;

(7) After the flue gas after desulfurization and dust removal enters the denitrification device, the catalytic reduction SCR method is used for denitrification. Ammonia, CO or hydrocarbons are used as reducing agents to reduce NO in the flue gas to N2 in the presence of oxygen;

(8) The treated smoke is exhausted by a smoke exhaust fan, and an automatic cooling air system is provided at the inlet of the smoke exhaust fan to protect the smoke exhaust fan.

The production equipment for incineration, desulfurization, dust removal and denitrification of organic flue gas includes a kiln, a flue gas pipeline, a waste heat recovery device, a desulfurization device, a dust removal device and a denitrification device. An incinerator is added above the kiln at the outlet of the flue gas pipeline. The flue gas exhaust pipe of the incinerator is connected to the waste heat recovery device through an air heat exchanger and a elbow joint. The flue gas outlet pipe of the waste heat recovery device is connected to the flue gas inlet pipe of the desulfurization device. The flue gas outlet of the desulfurization device is connected to the flue gas inlet pipe of the dust removal device through a connecting pipe. The flue gas outlet pipe of the dust removal device is connected to the flue gas inlet pipe of the denitrification device through a pipe. The purified flue gas after denitrification is sent into the flue gas pipeline through the exhaust fan and then discharged into the air from the chimney.

Furthermore, the incinerator is composed of an "L"-shaped cylindrical furnace body, a large adjustment ratio burner, a guide center column, a guide constriction and a smoke exhaust pipe. The "L"-shaped cylindrical furnace body is made of a metal shell filled with refractory insulation material. The horizontal long cylinder is fixedly installed on the top of the kiln through a support seat. An organic smoke inlet is arranged at the end of the vertical short cylinder and is connected to the kiln smoke exhaust pipe. The guide center column is vertically installed at the center of the vertical short cylinder, and large adjustment ratio burners I are installed on the corresponding cylinder in an alternating and tangential direction. A guide constriction is arranged in the middle of the horizontal long cylinder, and a large adjustment ratio burner II is installed on the cylinder behind the guide constriction along the tangential direction. A honeycomb ceramic partition wall is arranged at the tail to guide the smoke in the furnace so that it passes through the inner cavity evenly. The terminal smoke exhaust pipe is connected to the waste heat recovery and utilization device arranged on the ground plane through an air heat exchanger and a bend pipe joint.

Furthermore, explosion-proof/maintenance doors are respectively provided on the front and rear horizontal cylinders of the incinerator body where the diversion constriction is provided. The explosion-proof/maintenance doors are provided at an angle of 45° upwards from the cylinder, and a guardrail is provided at a corresponding position of the cylinder shell.

Furthermore, the waste heat recovery and utilization device is composed of a heat transfer oil heat exchanger and an air-to-air heat exchanger. The flue gas inlet of the heat transfer oil heat exchanger is connected to the flue gas pipe connected to the elbow joint, and its flue gas outlet is connected to the flue gas inlet of the air-to-air heat exchanger through a pipe, and the flue gas outlet of the air-to-air heat exchanger is connected to the flue gas inlet of the desulfurization device through a pipe.

Furthermore, a bypass pipe I was set up at the thermal oil heat exchanger, and 3 sets of automatic valves were installed, so that the equipment can be maintained online without affecting the entire production line; a bypass pipe II was set up next to the air-to-air heat exchanger, and 3 sets of automatic valves were also installed, so that the equipment can be maintained online without affecting the entire production line.

Furthermore, the desulfurization device adopts a baking soda dry desulfurization process; the dust removal device adopts a metal membrane bag dust collector to recover particulate matter in the flue gas; the denitrification device adopts a selective catalytic reduction method, and the reaction occurs in a reactor equipped with a catalyst. The flue gas reacts with the injected ammonia under the action of the catalyst to remove nitrogen oxides, wherein the reducing agent uses a 30% urea solution and the catalyst uses an SCR medium and low temperature catalyst.

The beneficial effects of the present invention are as follows: after the organic flue gas is incinerated for the second time, the flue gas discharged into the air meets the emission standards through processes such as desulfurization, dust removal, and denitrification, and can be widely used in industrial kiln flue gas purification or production processes to produce organic matter, hydrocarbons, dust, sulfur dioxide, nitrogen oxides and other pollutants, and is a comprehensive method for treating multi-pollutant gases. It can achieve thorough treatment of pollutants such as organic matter, dust, sulfur dioxide and nitrogen oxides, especially when it comes to treating flue gas with complex components. It has the advantages of high process and equipment stability, no secondary pollution in equipment and pipelines, high degree of automation, and humanized equipment layout and maintenance, so that the environmental protection problem of flue gas emissions of industrial kiln enterprises is solved, and has a wide range of practical application value.

The present invention will be further described below in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a flow chart of the process of the present invention;

FIG2 is a schematic diagram of the top view of the structure of the present invention;

FIG3 is a schematic diagram of the vertical structure of the incinerator of the present invention;

FIG4 is a schematic diagram of the top view of the incinerator of the present invention;

FIG5 is a schematic diagram of the cross-sectional structure of the guide center column of the present invention when viewed from the left;

FIG6 is a schematic diagram of the front view of the heat transfer oil heat exchanger of the present invention;

FIG7 is a schematic diagram of the left side structure of the heat transfer oil heat exchanger of the present invention;

FIG8 is a schematic diagram of the top view of the heat transfer oil heat exchanger of the present invention;

FIG9 is a schematic diagram of the front view of the air-to-air heat exchanger of the present invention;

FIG10 is a left-side structural schematic diagram of the air-to-air heat exchanger of the present invention;

FIG11 is a schematic diagram of the top view of the air-to-air heat exchanger of the present invention;

FIG12 is a schematic diagram of the main structure of the desulfurization, dust removal and denitrification of the present invention;

FIG13 is a left-side structural schematic diagram of the desulfurization, dust removal and denitrification system of the present invention.

In the figure: 1 is a kiln, 2 is an incinerator, 3 is an air heat exchanger, 4 is a flue gas duct, 5 is a heat transfer oil heat exchanger, 6 is a bypass duct I, 7 is an air-to-air heat exchanger, 8 is a bypass duct II, 9 is a desulfurization device, 10 is a dust removal device, 11 is a denitrification device, 12 is a smoke exhaust duct, 13 is a smoke exhaust induced draft fan, 14 is a chimney, 15 is an outer shell, 16 is a refractory insulation material, 17 is a furnace cavity, 18 is a support seat, 19 is a guide center column, 20 is a large adjustment ratio burner I, 21 is an organic smoke inlet, 22 is an explosion-proof/maintenance door, 23 is a flow guide shrinkage, 24 is a large adjustment ratio burner II, 25 is a honeycomb ceramic partition wall, 26 is a smoke exhaust pipe, 27 is a smoke inlet I, 28 is a smoke outlet I, 29 is a heat transfer oil inlet, 30 is a heat transfer oil outlet, 31 is an oil pipe, 32 is a smoke inlet II, 33 is a smoke outlet II, 34 is a cold air inlet, 35 is a hot air outlet, 36 is a ash cleaning hole, 37 is a smoke inlet III, 38 is a baking soda spray inlet, 39 is a connecting pipe, 40 is an ash hopper, and 41 is a pipe.

Detailed ways

The production process of organic flue gas incineration, desulfurization, dust removal and denitrification is to conduct secondary combustion of organic matter in the flue gas through the incinerator, and utilize the waste heat of the high-temperature flue gas after combustion, and then further treat the flue gas after incineration through desulfurization, dust removal, denitrification and other processes to make it meet the emission standards and then be discharged into the air. The specific steps are as follows:

(1) Use an incinerator to perform secondary incineration on the organic matter in the flue gas so that the organic matter in the flue gas is completely burned;

(2) Preheat the combustion air of the incinerator by passing the high-temperature flue gas through an air heat exchanger, preheat the normal-temperature combustion air to 450°C, and send the high-temperature air to the incinerator for combustion (theoretical and practical results show that for every 100°C increase in the combustion air temperature, 5% of fuel can be saved);

(3) Use the heat transfer oil heat exchanger to preheat the heat transfer oil with the heat carried by the high-temperature flue gas, preheat the normal temperature heat transfer oil to 180°C, and then transport it to the industry, energy, chemical industry and other industries for use;

(4) Use air-to-air heat exchangers to preheat the high-temperature flue gas to 450°C. The hot air can be used for workshop heating, product drying, etc.

(5) Sulfur and sulfur compounds in flue gas are removed by chemical adsorption using a desulfurization device and a baking soda dry desulfurization process;

(6) Use flue gas dust removal equipment to remove dust from the flue gas after desulfurization. When the dust-laden gas enters the membrane bag filter, due to the effect of gravity, the dust that is larger and heavier than the membrane bag filter settles and falls into the ash hopper. The fine dust-rich gas passes through the filter material, and the dust is blocked, so that the purified gas enters the subsequent process of desulfurization;

(7) After the flue gas after desulfurization and dust removal enters the denitrification device, the catalytic reduction SCR method is used for denitrification. Ammonia, CO or hydrocarbons are used as reducing agents to reduce NO in the flue gas to N2 in the presence of oxygen;

(8) The treated smoke is exhausted by a smoke exhaust fan, and an automatic cooling air system is provided at the inlet of the smoke exhaust fan to protect the smoke exhaust fan.

As shown in the figure: the production equipment for incineration, desulfurization, dust removal and denitrification of organic flue gas includes a kiln 1, an exhaust gas pipeline, a waste heat recovery device, a desulfurization device, a dust removal device and a denitrification device, etc. An incinerator 2 is added above the kiln 1 at the outlet of the exhaust gas pipeline. The exhaust pipe 26 of the incinerator 2 is connected to the waste heat recovery device through an elbow joint through an air heat exchanger 3. The flue gas outlet pipe of the waste heat recovery device is connected to the flue gas inlet III 37 of the desulfurization device 9. The flue gas outlet of the desulfurization device 9 is connected to the flue gas inlet pipe of the dust removal device 10 through a connecting pipe 39. The flue gas outlet pipe of the dust removal device 10 is connected to the flue gas inlet pipe of the denitrification device 11 through a pipe 41. The purified flue gas after denitrification is sent into the exhaust pipe 12 through the exhaust induced draft fan 13 and then discharged into the air from the chimney 14. The incinerator 2 is composed of an "L"-shaped cylindrical furnace body, a large adjustment ratio burner, a guide center column 19, a guide constriction 23 and a smoke exhaust pipe 26. The "L"-shaped cylindrical furnace body is made by filling a refractory heat-insulating material (16) in an outer shell 15. Its horizontal long cylinder is fixedly installed on the top of the kiln 1 through a support seat 18. An organic smoke inlet 21 is arranged at the end of the vertical short cylinder and is connected to the kiln smoke exhaust pipe. The guide center column 19 is vertically installed at the center of the vertical short cylinder, and a large adjustment ratio burner I 20 is staggered and installed on the corresponding cylinder along the tangential direction. A guide constriction 23 is arranged in the middle of the horizontal long cylinder, and a large adjustment ratio burner II 24 is installed on the cylinder behind the guide constriction along the tangential direction. A honeycomb ceramic partition wall 25 is arranged at the tail to guide the smoke in the furnace so that it passes through the inner cavity evenly. The end smoke exhaust pipe 26 is connected to the waste heat recovery and utilization device arranged on the ground plane through the air heat exchanger 3 and a bend pipe joint. Explosion-proof/inspection doors 22 are respectively provided on the front and rear horizontal cylinders of the incinerator body where the flow constriction 23 is provided. The explosion-proof/inspection doors 22 are provided at an angle of 45° upward from the cylinder, and a guardrail is provided at the corresponding position of the shell 15. The waste heat recovery device is composed of a heat transfer oil heat exchanger 5 and an air-to-air heat exchanger 7. The flue gas inlet Ⅰ27 of the heat transfer oil heat exchanger 5 is connected to the flue gas pipe 4 connected to the elbow joint, and its flue gas outlet Ⅰ28 is connected to the flue gas inlet Ⅱ32 of the air-to-air heat exchanger 7 through a pipe, and the flue gas outlet Ⅱ33 of the air-to-air heat exchanger 7 is connected to the flue gas inlet Ⅲ37 of the desulfurization device through a pipe. A bypass pipe Ⅰ6 is provided at the heat transfer oil heat exchanger 5, and a bypass pipe Ⅱ8 is provided next to the air-to-air heat exchanger 7. The desulfurization device 9 adopts a baking soda dry desulfurization process; the dust removal device 10 adopts a metal membrane bag dust collector to recover particulate matter in the flue gas; the denitrification device 11 adopts a selective catalytic reduction method, which occurs in a reactor equipped with a catalyst. The flue gas reacts with the injected ammonia under the action of the catalyst to remove nitrogen oxides, wherein the reducing agent uses a 30% urea solution and the catalyst uses an SCR medium and low temperature catalyst.

Take the construction of a tunnel kiln flue gas treatment project for producing magnesium-calcium bricks as an example, it includes a tunnel kiln 1, an incinerator 2, an air heat exchanger 3, a thermal oil heat exchanger 5, an air-to-air heat exchanger 7, a desulfurization device 9, a dust removal device 10, a denitrification device 11, a smoke exhaust duct 12 and a smoke exhaust fan 13. The smoke generated by the calcination of the products in the tunnel kiln passes through the smoke exhaust hole on the side wall of the preheating zone and then is collected in the branch flue on the top of the kiln. It is sent in from the organic smoke inlet 21 set at the bottom of the vertical end of the incinerator 2, and is completely incinerated in the second stage of the incinerator. The high-temperature smoke is preheated to 450°C by the air heat exchanger 3, and the 450°C hot air is sent to the large adjustment ratio burner set on the incinerator 2 for combustion assistance. The high-temperature smoke continues to be sent to the next process through the smoke duct 4 connected to the elbow joint, and the heat of the high-temperature smoke is convected through the heat transfer oil heat exchanger 5. The oil is preheated to 180°C, and then transported to the industry, energy, chemical industry and other industries for use; the medium-temperature flue gas continues to flow to the next process, passes through the air-to-air heat exchanger 7, and uses the medium-temperature flue gas to preheat the room-temperature air to 450°C. The hot air can be used for workshop heating, product drying, etc.; the flue gas continues to flow to the next process, passes through the desulfurization device 9, and the sulfur and sulfur compounds in the flue gas are desulfurized by baking soda dry method. The desulfurization ash by-product formed after desulfurization enters the dust collector for collection, and a small part enters the desulfurization through the return trough The flue gas flows into the dust removal device 10 through the connecting pipe 39. The gas purification method of the dust removal device 10 is external filtration. The dust-containing flue gas enters the filter chamber of each unit through the guide pipe and passes through the flue gas guide device installed in the ash hopper. Due to the vertical distance between the bottom of the bag and the upper mouth of the air inlet in the design, there is sufficient and reasonable clearance. The airflow is distributed through proper diversion and natural flow direction to achieve uniform airflow distribution in the entire filter chamber. The particulate dust in the dust-containing gas falls directly into the ash hopper after natural sedimentation separation, and the rest of the dust Under the guidance of the flow guide system, the dust enters the filtering area of the middle box along with the air flow and is adsorbed on the outer surface of the dust filter bag; the flue gas after filtering and dust removal passes through the denitrification device 11, which adopts a selective catalytic reduction method. The reaction occurs in a reactor equipped with a catalyst. The flue gas reacts with the injected ammonia under the action of the catalyst to remove nitrogen oxides; then the smoke exhaust fan 13 is used to send the treated purified flue gas that meets the standards into the smoke exhaust pipe 12 and then discharged into the air from the chimney, and an automatic cooling air distribution system is provided at the inlet of the smoke exhaust fan to protect the smoke exhaust fan.

Since the present invention uses metal film bags instead of traditional cloth bags, it can not only achieve high-temperature (350°C) dust removal, but also solves the hidden dangers of inadequate flue gas dust removal and clogging of cloth bags and subsequent equipment; (because the flue gas may contain organic matter such as paraffin, paraffin and other organic matter condense at low temperatures (90°C), which can easily clog the cloth bags). Multi-stage waste heat recovery and utilization devices (such as incinerator combustion air preheating system, thermal oil heat exchange system, air-to-air heat exchanger system, etc.) can maximize the utilization of flue gas heat; waste heat recovery and utilization devices are equipped with bypass systems, that is, they can be replaced online when a certain equipment fails, thereby enhancing the stability and safety of the entire processing process and equipment. The design of the process and the use of the equipment are based on energy saving and environmental protection; with low nitrogen and environmentally friendly emissions as the purpose; it is the most concentrated production process for flue gas treatment equipment in the field of industrial kilns on the market.

The organic flue gas of the present invention enters the incinerator for incineration at a temperature of 800°C (due to different organic components, the incineration temperature is also different); the fuel of the flue gas incinerator can be any one of natural gas, coke oven gas, and gas; the waste heat utilization equipment includes an air heat exchanger, a thermal oil heat exchanger, or a hot water heat exchanger, but is not limited to the above equipment.

Claims (6)

1. A production process for organic fume incineration, desulfurization, dust removal and denitration is characterized by comprising the following steps of: the organic matters in the flue gas are secondarily combusted through the incinerator, waste heat utilization is carried out on the combusted high-temperature flue gas, and then the incinerated flue gas is further treated through desulfurization, dust removal and denitration processes, so that the incinerated flue gas reaches the emission standard and is discharged into the air, and the method comprises the following specific steps:

(1) The incinerator is utilized to carry out secondary incineration on the organic matters in the flue gas so as to enable the organic matters in the flue gas to be completely combusted;

(2) Preheating combustion-supporting air of the incinerator by high-temperature flue gas through an air heat exchanger, preheating normal-temperature combustion-supporting air to 450 ℃, and delivering the high-temperature air to the incinerator for combustion supporting;

(3) Preheating heat conducting oil by utilizing a heat conducting oil heat exchanger, preheating normal-temperature heat conducting oil to 180 ℃, and then conveying the heat conducting oil to industries, energy sources and chemical industries for use;

(4) Preheating the high-temperature flue gas to the temperature of 450 ℃ by utilizing an air-air heat exchanger, wherein hot air can be used for workshop heating and product drying;

(5) Sulfur and sulfur compounds in the flue gas are removed by chemical adsorption by using a desulfurization device and adopting a baking soda dry desulfurization process;

(6) The flue gas dust removal device is adopted to remove dust from the desulfurized flue gas, when the dust-containing gas enters the membrane bag type dust remover, the dust larger and heavier than the membrane bag type dust remover is settled due to the action of gravity and falls into the ash bucket, and the dust is filled with fine dust-containing gas through the filter material, so that the purified gas enters the subsequent process;

(7) After the flue gas subjected to desulfurization and dust removal enters a denitration device, denitration is performed by adopting a catalytic reduction SCR method, ammonia, CO or hydrocarbon is used as a reducing agent, and NO in the flue gas is reduced into N2 in the presence of oxygen;

(8) The smoke after treatment is exhausted by using the smoke exhaust induced draft fan, and an automatic cold air distribution system is arranged at the inlet of the smoke exhaust induced draft fan to protect the smoke exhaust induced draft fan.

2. The utility model provides a production facility that organic flue gas burns, desulfurization, dust removal and denitration, it includes kiln (1), exhaust gas pipeline, waste heat recovery device, desulphurization unit, dust collector and denitrification facility, its characterized in that: an incinerator (2) is additionally arranged above a kiln (1) at the outlet of a smoke exhaust pipeline, the incinerator (2) is composed of an L-shaped cylindrical furnace body, a large-adjustment-ratio burner, a flow guiding central column (19), a flow guiding shrinkage port (23) and a smoke exhaust pipe (26), the L-shaped cylindrical furnace body is formed by filling a shell (15) with a fireproof heat insulation material (16), a horizontal long cylinder body of the L-shaped cylindrical furnace body is fixedly arranged at the top of the kiln (1) through a supporting seat (18), an organic smoke inlet (21) is arranged at the end part of a vertical short cylinder body and is connected with the smoke exhaust pipeline of the kiln, the flow guiding central column (19) is vertically arranged at the center of the vertical short cylinder body, the corresponding cylinder body is staggered, the large-adjustment-ratio burner I (20) is arranged in the tangential direction, the middle part of the horizontal long cylinder body is provided with a flow guiding shrinkage port (23), the cylinder body behind the flow guiding shrinkage port is arranged in the tangential direction, the tail part is provided with a honeycomb Tao Geqiang (25), the smoke in the kiln uniformly passes through an inner cavity, and the tail end smoke exhaust pipe (26) is connected with a waste heat recycling device through an elbow pipe (3) and is connected with a waste heat recycling device; the flue gas outlet pipe of the waste heat utilization recovery device is connected with a flue gas inlet III (37) of the desulfurization device (9), the flue gas outlet of the desulfurization device (9) is connected with a flue gas inlet pipe of the dust removal device (10) through a connecting pipeline (39), the flue gas outlet pipe of the dust removal device (10) is connected with a flue gas inlet pipe of the denitration device (11) through a pipeline (41), and purified flue gas after denitration is sent into a flue gas exhaust pipeline (12) through a flue gas exhaust draught fan (13) and then discharged into the air from a chimney (14).

3. The production equipment for organic fume incineration, desulfurization, dust removal and denitration according to claim 2, which is characterized in that: an explosion-proof/access door (22) is respectively arranged on the front horizontal cylinder body and the rear horizontal cylinder body of the incinerator body, the flow-guiding shrinkage opening (23) is arranged on the incinerator body, the explosion-proof/access door (22) is arranged at an included angle of 45 degrees upwards of the cylinder body, and a protective guard is arranged at the corresponding position of the shell (15).

4. A production facility for incineration, desulfurization, dust removal and denitration of organic fumes according to claim 2 or 3, characterised in that: the waste heat recycling device is composed of a heat conducting oil heat exchanger (5) and an air-air heat exchanger (7), a flue gas inlet I (27) of the heat conducting oil heat exchanger (5) is connected with a flue gas pipeline (4) connected with an elbow joint, a flue gas outlet I (28) of the heat conducting oil heat exchanger is connected with a flue gas inlet II (32) of the air-air heat exchanger (7) through a pipeline, and a flue gas outlet II (33) of the air-air heat exchanger (7) is connected with a flue gas inlet III (37) of the desulfurization device through a pipeline.

5. The production equipment for organic fume incineration, desulfurization, dust removal and denitration according to claim 4, wherein: a bypass pipeline I (6) is arranged at the heat conducting oil heat exchanger (5), and a bypass pipeline II (8) is arranged beside the air-air heat exchanger (7).

6. The production equipment for organic fume incineration, desulfurization, dust removal and denitration according to claim 5, wherein: the desulfurization device (9) adopts a baking soda dry desulfurization process; the dust removing device (10) adopts a metal film bag type dust remover to recycle the particulate matters in the flue gas; the denitration device (11) adopts a selective catalytic reduction method, the reduction reaction occurs in a reactor filled with a catalyst, the flue gas reacts with sprayed ammonia under the action of the catalyst to reduce oxynitride, wherein a 30% urea solution is adopted as a reducing agent, and an SCR medium-low temperature catalyst is adopted as the catalyst.